|District|Name|Party|District Office|First elected|
|---|---|---|---|---|
|1|A.G. Crowe|Rep|Slidell|2007|
|2|Troy Brown|Dem|Napoleonville|2011|
|3|J.P. Morrell|Dem|New Orleans|2008†|
|4|Ed Murray|Dem|New Orleans|2005†|
|5|Karen Carter Peterson|Dem|New Orleans|2010†|
|6|Bodi White|Rep|Baton Rouge|2011|
|7|David Heitmeier|Dem|New Orleans|2007|
|8|John Alario|Rep|Westwego|2007|
|9|Conrad Appel|Rep|Metairie|2008†|
|10|Daniel Martiny|Rep|Metairie|2007|
|11|Jack Donahue|Rep|Mandeville|2007|
|12|Ben Nevers|Dem|Bogalusa|2003|
|13|Dale M. Erdey|Rep|Livingston|2007|
|14|Yvonne Dorsey-Colomb|Dem|Baton Rouge|2007|
|15|Sharon Weston Broome|Dem|Baton Rouge|2004†|
|16|Dan Claitor|Rep|Baton Rouge|2009†|
|17|Rick Ward, III|Rep|Port Allen|2011|
|18|Jody Amedee|Rep|Gonzales|2003|
|19|Gary Smith, Jr.|Dem|Norco|2011|
|20|Norby Chabert|Rep|Houma|2009†|
|21|Bret Allain|Rep|Franklin|2011|
|22|Fred H. Mills, Jr.|Rep|New Iberia|2011†|
|23|Page Cortez|Rep|Lafayette|2011|
|24|Elbert Guillory|Rep|Opelousas|2009†|
|25|Dan "Blade" Morrish|Rep|Jennings|2007|
|26|Jonathan Perry|Rep|Kaplan|2011†|
|27|Ronnie Johns|Rep|Lake Charles|2011|
|28|Eric LaFleur|Dem|Ville Platte|2007|
|29|Rick Gallot|Dem|Ruston|2011|
|30|John R. Smith|Rep|Leesville|2007|
|31|Gerald Long|Rep|Winnfield|2007|
|32|Neil Riser|Rep|Columbia|2007|
|33|Mike Walsworth|Rep|West Monroe|2007|
|34|Francis C. Thompson|Dem|Delhi|2007|
|35|Robert Kostelka|Rep|Monroe|2003|
|36|Robert Adley|Rep|Benton|2003|
|37|Barrow Peacock|Rep|Bossier|2011|
|38|Sherri Smith Buffington|Rep|Keithville|2003|
|39|Gregory Tarver|Dem|Shreveport|2011|

Question: how many senators are from baton rouge?
Answer: 4